South Dakota – A sharp edge of winter is tightening across the eastern plains, with crisp air, gusty winds, and light snow poised to change how Friday feels and drives across the region. Pavement that looks merely wet early could turn slick quickly as colder air deepens and snow showers move through.
According to the National Weather Service in Sioux Falls, a weak system arriving Thursday night brings a chance for light snow and patchy blowing snow into Friday. Snow totals remain modest, but strong northwest winds could briefly cut visibility, especially in open areas of southeastern South Dakota and along rural highways.
In Sioux Falls, temperatures climb near 40 degrees Thursday before falling sharply. Snow becomes more likely late Thursday and Friday, with highs Friday near the upper 20s. Winds may gust over 40 mph, pushing loose snow across roads and increasing the risk of sudden slick spots. Drivers along I-29, I-90, and exposed county roads should expect changing conditions through the day Friday.
The bigger concern comes after snow melts. As temperatures drop Friday evening, flash freezing may develop on untreated roads, sidewalks, and parking lots. Even light snow can create hazardous travel when paired with strong wind and falling temperatures. Plan extra time, slow down, and keep winter gear ready.
Colder air settles in for the weekend, keeping daytime highs near 10 degrees Saturday with subzero wind chills at times. Milder temperatures return Sunday, but another light snow chance lingers.
Looking ahead, longer-range outlooks suggest colder air holding across the Midwest into Jan. 19–23, with precipitation chances rising again. More alerts may follow as details sharpen. Traveling Friday? Tell us what conditions look like where you are.
Five-Day Outlook for Sioux Falls, SD
• Thursday: Partly sunny, breezy. High near 41.
• Friday: Snow likely, windy. High near 29.
• Saturday: Partly sunny, much colder. High near 10.
• Sunday: Partly sunny, slight snow chance. High near 26.
• Monday: Mostly sunny and cold. High near 19.
